The BIOS shouldn't be touching this memory across suspend/resume, so just leave it alone. This saves us ~50ms on resume on my T420.
Signed-off-by: Jesse Barnes <[email protected]> --- drivers/gpu/drm/i915/i915_drv.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 824e3c8..95e2b8b 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -119,6 +119,10 @@ module_param_named(i915_enable_ppgtt, i915_enable_ppgtt, int, 0600); MODULE_PARM_DESC(i915_enable_ppgtt, "Enable PPGTT (default: true)"); +int i915_needs_gtt_restore __read_mostly = 0; +module_param_named(gtt_restore, i915_needs_gtt_restore, int, 0600); +MODULE_PARM_DESC(gtt_restore, "Rewrite GTT on resume (default: false)"); + static struct drm_driver driver; extern int intel_agp_enabled; @@ -537,7 +541,8 @@ static int i915_drm_thaw(struct drm_device *dev) struct drm_i915_private *dev_priv = dev->dev_private; int error = 0; - if (drm_core_check_feature(dev, DRIVER_MODESET)) { + if (drm_core_check_feature(dev, DRIVER_MODESET) && + i915_needs_gtt_restore) { mutex_lock(&dev->struct_mutex); i915_gem_restore_gtt_mappings(dev); mutex_unlock(&dev->struct_mutex); -- 1.7.9.5 _______________________________________________ Intel-gfx mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/intel-gfx
